package sevelet;

import pojo.User;
import service.UserService;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;

@WebServlet(name = "LoginServlet", value = "/Login")
public class LoginServlet extends HttpServlet {
    private UserService userService=new UserService();

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        String rememberMe = request.getParameter("rememberMe");
//2. 调用service查询
        User user = userService.login(username, password);
//3. 判断
        if(user != null) {
//登录成功，跳转到查询所有的BrandServlet
            if ("1".equals(rememberMe)) {
//勾选了rememberMe，则发送Cookie
//1. 创建Cookie对象
                Cookie cookieUsername = new Cookie("username", username);
                Cookie cookiePassword = new Cookie("password", password);
// 设置Cookie的存活时间7天
                cookieUsername.setMaxAge(60 * 60 * 24 * 7);
                cookiePassword.setMaxAge(60 * 60 * 24 * 7);
                response.addCookie(cookieUsername);
                response.addCookie(cookiePassword);
            }
//将登陆成功后的user对象，存储到session
            HttpSession session = request.getSession();
            session.setAttribute("LOGIN_USER",user);
            String contextPath = request.getContextPath();
            response.sendRedirect(contextPath+"/selectAll");
        }else {
// 登录失败,
// 存储错误信息到request
            request.setAttribute("LOGIN_MSG","用户名或密码错误");
// 转发到login.jsp
            request.getRequestDispatcher("/login.jsp").forward(request,response);
        }
    }
}
